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Diffstat (limited to 'include/video/vga.h')
| -rw-r--r-- | include/video/vga.h | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/include/video/vga.h b/include/video/vga.h new file mode 100644 index 000000000..947c0abd0 --- /dev/null +++ b/include/video/vga.h @@ -0,0 +1,461 @@ +/* + * linux/include/video/vga.h -- standard VGA chipset interaction + * + * Copyright 1999 Jeff Garzik <jgarzik@pobox.com> + * + * Copyright history from vga16fb.c: + * Copyright 1999 Ben Pfaff and Petr Vandrovec + * Based on VGA info at http://www.osdever.net/FreeVGA/home.htm + * Based on VESA framebuffer (c) 1998 Gerd Knorr + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + * + */ + +#ifndef __linux_video_vga_h__ +#define __linux_video_vga_h__ + +#include <linux/types.h> +#include <linux/io.h> +#include <asm/vga.h> +#include <asm/byteorder.h> + +#define VGA_FB_PHYS_BASE 0xA0000 /* VGA framebuffer I/O base */ +#define VGA_FB_PHYS_SIZE 65536 /* VGA framebuffer I/O size */ + +/* Some of the code below is taken from SVGAlib. The original, + unmodified copyright notice for that code is below. */ +/* VGAlib version 1.2 - (c) 1993 Tommy Frandsen */ +/* */ +/* This library is free software; you can redistribute it and/or */ +/* modify it without any restrictions. This library is distributed */ +/* in the hope that it will be useful, but without any warranty. */ + +/* Multi-chipset support Copyright 1993 Harm Hanemaayer */ +/* partially copyrighted (C) 1993 by Hartmut Schirmer */ + +/* VGA data register ports */ +#define VGA_CRT_DC 0x3D5 /* CRT Controller Data Register - color emulation */ +#define VGA_CRT_DM 0x3B5 /* CRT Controller Data Register - mono emulation */ +#define VGA_ATT_R 0x3C1 /* Attribute Controller Data Read Register */ +#define VGA_ATT_W 0x3C0 /* Attribute Controller Data Write Register */ +#define VGA_GFX_D 0x3CF /* Graphics Controller Data Register */ +#define VGA_SEQ_D 0x3C5 /* Sequencer Data Register */ +#define VGA_MIS_R 0x3CC /* Misc Output Read Register */ +#define VGA_MIS_W 0x3C2 /* Misc Output Write Register */ +#define VGA_FTC_R 0x3CA /* Feature Control Read Register */ +#define VGA_IS1_RC 0x3DA /* Input Status Register 1 - color emulation */ +#define VGA_IS1_RM 0x3BA /* Input Status Register 1 - mono emulation */ +#define VGA_PEL_D 0x3C9 /* PEL Data Register */ +#define VGA_PEL_MSK 0x3C6 /* PEL mask register */ + +/* EGA-specific registers */ +#define EGA_GFX_E0 0x3CC /* Graphics enable processor 0 */ +#define EGA_GFX_E1 0x3CA /* Graphics enable processor 1 */ + +/* VGA index register ports */ +#define VGA_CRT_IC 0x3D4 /* CRT Controller Index - color emulation */ +#define VGA_CRT_IM 0x3B4 /* CRT Controller Index - mono emulation */ +#define VGA_ATT_IW 0x3C0 /* Attribute Controller Index & Data Write Register */ +#define VGA_GFX_I 0x3CE /* Graphics Controller Index */ +#define VGA_SEQ_I 0x3C4 /* Sequencer Index */ +#define VGA_PEL_IW 0x3C8 /* PEL Write Index */ +#define VGA_PEL_IR 0x3C7 /* PEL Read Index */ + +/* standard VGA indexes max counts */ +#define VGA_CRT_C 0x19 /* Number of CRT Controller Registers */ +#define VGA_ATT_C 0x15 /* Number of Attribute Controller Registers */ +#define VGA_GFX_C 0x09 /* Number of Graphics Controller Registers */ +#define VGA_SEQ_C 0x05 /* Number of Sequencer Registers */ +#define VGA_MIS_C 0x01 /* Number of Misc Output Register */ + +/* VGA misc register bit masks */ +#define VGA_MIS_COLOR 0x01 +#define VGA_MIS_ENB_MEM_ACCESS 0x02 +#define VGA_MIS_DCLK_28322_720 0x04 +#define VGA_MIS_ENB_PLL_LOAD (0x04 | 0x08) +#define VGA_MIS_SEL_HIGH_PAGE 0x20 + +/* VGA CRT controller register indices */ +#define VGA_CRTC_H_TOTAL 0 +#define VGA_CRTC_H_DISP 1 +#define VGA_CRTC_H_BLANK_START 2 +#define VGA_CRTC_H_BLANK_END 3 +#define VGA_CRTC_H_SYNC_START 4 +#define VGA_CRTC_H_SYNC_END 5 +#define VGA_CRTC_V_TOTAL 6 +#define VGA_CRTC_OVERFLOW 7 +#define VGA_CRTC_PRESET_ROW 8 +#define VGA_CRTC_MAX_SCAN 9 +#define VGA_CRTC_CURSOR_START 0x0A +#define VGA_CRTC_CURSOR_END 0x0B +#define VGA_CRTC_START_HI 0x0C +#define VGA_CRTC_START_LO 0x0D +#define VGA_CRTC_CURSOR_HI 0x0E +#define VGA_CRTC_CURSOR_LO 0x0F +#define VGA_CRTC_V_SYNC_START 0x10 +#define VGA_CRTC_V_SYNC_END 0x11 +#define VGA_CRTC_V_DISP_END 0x12 +#define VGA_CRTC_OFFSET 0x13 +#define VGA_CRTC_UNDERLINE 0x14 +#define VGA_CRTC_V_BLANK_START 0x15 +#define VGA_CRTC_V_BLANK_END 0x16 +#define VGA_CRTC_MODE 0x17 +#define VGA_CRTC_LINE_COMPARE 0x18 +#define VGA_CRTC_REGS VGA_CRT_C + +/* VGA CRT controller bit masks */ +#define VGA_CR11_LOCK_CR0_CR7 0x80 /* lock writes to CR0 - CR7 */ +#define VGA_CR17_H_V_SIGNALS_ENABLED 0x80 + +/* VGA attribute controller register indices */ +#define VGA_ATC_PALETTE0 0x00 +#define VGA_ATC_PALETTE1 0x01 +#define VGA_ATC_PALETTE2 0x02 +#define VGA_ATC_PALETTE3 0x03 +#define VGA_ATC_PALETTE4 0x04 +#define VGA_ATC_PALETTE5 0x05 +#define VGA_ATC_PALETTE6 0x06 +#define VGA_ATC_PALETTE7 0x07 +#define VGA_ATC_PALETTE8 0x08 +#define VGA_ATC_PALETTE9 0x09 +#define VGA_ATC_PALETTEA 0x0A +#define VGA_ATC_PALETTEB 0x0B +#define VGA_ATC_PALETTEC 0x0C +#define VGA_ATC_PALETTED 0x0D +#define VGA_ATC_PALETTEE 0x0E +#define VGA_ATC_PALETTEF 0x0F +#define VGA_ATC_MODE 0x10 +#define VGA_ATC_OVERSCAN 0x11 +#define VGA_ATC_PLANE_ENABLE 0x12 +#define VGA_ATC_PEL 0x13 +#define VGA_ATC_COLOR_PAGE 0x14 + +#define VGA_AR_ENABLE_DISPLAY 0x20 + +/* VGA sequencer register indices */ +#define VGA_SEQ_RESET 0x00 +#define VGA_SEQ_CLOCK_MODE 0x01 +#define VGA_SEQ_PLANE_WRITE 0x02 +#define VGA_SEQ_CHARACTER_MAP 0x03 +#define VGA_SEQ_MEMORY_MODE 0x04 + +/* VGA sequencer register bit masks */ +#define VGA_SR01_CHAR_CLK_8DOTS 0x01 /* bit 0: character clocks 8 dots wide are generated */ +#define VGA_SR01_SCREEN_OFF 0x20 /* bit 5: Screen is off */ +#define VGA_SR02_ALL_PLANES 0x0F /* bits 3-0: enable access to all planes */ +#define VGA_SR04_EXT_MEM 0x02 /* bit 1: allows complete mem access to 256K */ +#define VGA_SR04_SEQ_MODE 0x04 /* bit 2: directs system to use a sequential addressing mode */ +#define VGA_SR04_CHN_4M 0x08 /* bit 3: selects modulo 4 addressing for CPU access to display memory */ + +/* VGA graphics controller register indices */ +#define VGA_GFX_SR_VALUE 0x00 +#define VGA_GFX_SR_ENABLE 0x01 +#define VGA_GFX_COMPARE_VALUE 0x02 +#define VGA_GFX_DATA_ROTATE 0x03 +#define VGA_GFX_PLANE_READ 0x04 +#define VGA_GFX_MODE 0x05 +#define VGA_GFX_MISC 0x06 +#define VGA_GFX_COMPARE_MASK 0x07 +#define VGA_GFX_BIT_MASK 0x08 + +/* VGA graphics controller bit masks */ +#define VGA_GR06_GRAPHICS_MODE 0x01 + +/* macro for composing an 8-bit VGA register index and value + * into a single 16-bit quantity */ +#define VGA_OUT16VAL(v, r) (((v) << 8) | (r)) + +/* decide whether we should enable the faster 16-bit VGA register writes */ +#ifdef __LITTLE_ENDIAN +#define VGA_OUTW_WRITE +#endif + +/* VGA State Save and Restore */ +#define VGA_SAVE_FONT0 1 /* save/restore plane 2 fonts */ +#define VGA_SAVE_FONT1 2 /* save/restore plane 3 fonts */ +#define VGA_SAVE_TEXT 4 /* save/restore plane 0/1 fonts */ +#define VGA_SAVE_FONTS 7 /* save/restore all fonts */ +#define VGA_SAVE_MODE 8 /* save/restore video mode */ +#define VGA_SAVE_CMAP 16 /* save/restore color map/DAC */ + +struct vgastate { + void __iomem *vgabase; /* mmio base, if supported */ + unsigned long membase; /* VGA window base, 0 for default - 0xA000 */ + __u32 memsize; /* VGA window size, 0 for default 64K */ + __u32 flags; /* what state[s] to save (see VGA_SAVE_*) */ + __u32 depth; /* current fb depth, not important */ + __u32 num_attr; /* number of att registers, 0 for default */ + __u32 num_crtc; /* number of crt registers, 0 for default */ + __u32 num_gfx; /* number of gfx registers, 0 for default */ + __u32 num_seq; /* number of seq registers, 0 for default */ + void *vidstate; +}; + +extern int save_vga(struct vgastate *state); +extern int restore_vga(struct vgastate *state); + +/* + * generic VGA port read/write + */ + +static inline unsigned char vga_io_r (unsigned short port) +{ + return inb_p(port); +} + +static inline void vga_io_w (unsigned short port, unsigned char val) +{ + outb_p(val, port); +} + +static inline void vga_io_w_fast (unsigned short port, unsigned char reg, + unsigned char val) +{ + outw(VGA_OUT16VAL (val, reg), port); +} + +static inline unsigned char vga_mm_r (void __iomem *regbase, unsigned short port) +{ + return readb (regbase + port); +} + +static inline void vga_mm_w (void __iomem *regbase, unsigned short port, unsigned char val) +{ + writeb (val, regbase + port); +} + +static inline void vga_mm_w_fast (void __iomem *regbase, unsigned short port, + unsigned char reg, unsigned char val) +{ + writew (VGA_OUT16VAL (val, reg), regbase + port); +} + +static inline unsigned char vga_r (void __iomem *regbase, unsigned short port) +{ + if (regbase) + return vga_mm_r (regbase, port); + else + return vga_io_r (port); +} + +static inline void vga_w (void __iomem *regbase, unsigned short port, unsigned char val) +{ + if (regbase) + vga_mm_w (regbase, port, val); + else + vga_io_w (port, val); +} + + +static inline void vga_w_fast (void __iomem *regbase, unsigned short port, + unsigned char reg, unsigned char val) +{ + if (regbase) + vga_mm_w_fast (regbase, port, reg, val); + else + vga_io_w_fast (port, reg, val); +} + + +/* + * VGA CRTC register read/write + */ + +static inline unsigned char vga_rcrt (void __iomem *regbase, unsigned char reg) +{ + vga_w (regbase, VGA_CRT_IC, reg); + return vga_r (regbase, VGA_CRT_DC); +} + +static inline void vga_wcrt (void __iomem *regbase, unsigned char reg, unsigned char val) +{ +#ifdef VGA_OUTW_WRITE + vga_w_fast (regbase, VGA_CRT_IC, reg, val); +#else + vga_w (regbase, VGA_CRT_IC, reg); + vga_w (regbase, VGA_CRT_DC, val); +#endif /* VGA_OUTW_WRITE */ +} + +static inline unsigned char vga_io_rcrt (unsigned char reg) +{ + vga_io_w (VGA_CRT_IC, reg); + return vga_io_r (VGA_CRT_DC); +} + +static inline void vga_io_wcrt (unsigned char reg, unsigned char val) +{ +#ifdef VGA_OUTW_WRITE + vga_io_w_fast (VGA_CRT_IC, reg, val); +#else + vga_io_w (VGA_CRT_IC, reg); + vga_io_w (VGA_CRT_DC, val); +#endif /* VGA_OUTW_WRITE */ +} + +static inline unsigned char vga_mm_rcrt (void __iomem *regbase, unsigned char reg) +{ + vga_mm_w (regbase, VGA_CRT_IC, reg); + return vga_mm_r (regbase, VGA_CRT_DC); +} + +static inline void vga_mm_wcrt (void __iomem *regbase, unsigned char reg, unsigned char val) +{ +#ifdef VGA_OUTW_WRITE + vga_mm_w_fast (regbase, VGA_CRT_IC, reg, val); +#else + vga_mm_w (regbase, VGA_CRT_IC, reg); + vga_mm_w (regbase, VGA_CRT_DC, val); +#endif /* VGA_OUTW_WRITE */ +} + + +/* + * VGA sequencer register read/write + */ + +static inline unsigned char vga_rseq (void __iomem *regbase, unsigned char reg) +{ + vga_w (regbase, VGA_SEQ_I, reg); + return vga_r (regbase, VGA_SEQ_D); +} + +static inline void vga_wseq (void __iomem *regbase, unsigned char reg, unsigned char val) +{ +#ifdef VGA_OUTW_WRITE + vga_w_fast (regbase, VGA_SEQ_I, reg, val); +#else + vga_w (regbase, VGA_SEQ_I, reg); + vga_w (regbase, VGA_SEQ_D, val); +#endif /* VGA_OUTW_WRITE */ +} + +static inline unsigned char vga_io_rseq (unsigned char reg) +{ + vga_io_w (VGA_SEQ_I, reg); + return vga_io_r (VGA_SEQ_D); +} + +static inline void vga_io_wseq (unsigned char reg, unsigned char val) +{ +#ifdef VGA_OUTW_WRITE + vga_io_w_fast (VGA_SEQ_I, reg, val); +#else + vga_io_w (VGA_SEQ_I, reg); + vga_io_w (VGA_SEQ_D, val); +#endif /* VGA_OUTW_WRITE */ +} + +static inline unsigned char vga_mm_rseq (void __iomem *regbase, unsigned char reg) +{ + vga_mm_w (regbase, VGA_SEQ_I, reg); + return vga_mm_r (regbase, VGA_SEQ_D); +} + +static inline void vga_mm_wseq (void __iomem *regbase, unsigned char reg, unsigned char val) +{ +#ifdef VGA_OUTW_WRITE + vga_mm_w_fast (regbase, VGA_SEQ_I, reg, val); +#else + vga_mm_w (regbase, VGA_SEQ_I, reg); + vga_mm_w (regbase, VGA_SEQ_D, val); +#endif /* VGA_OUTW_WRITE */ +} + +/* + * VGA graphics controller register read/write + */ + +static inline unsigned char vga_rgfx (void __iomem *regbase, unsigned char reg) +{ + vga_w (regbase, VGA_GFX_I, reg); + return vga_r (regbase, VGA_GFX_D); +} + +static inline void vga_wgfx (void __iomem *regbase, unsigned char reg, unsigned char val) +{ +#ifdef VGA_OUTW_WRITE + vga_w_fast (regbase, VGA_GFX_I, reg, val); +#else + vga_w (regbase, VGA_GFX_I, reg); + vga_w (regbase, VGA_GFX_D, val); +#endif /* VGA_OUTW_WRITE */ +} + +static inline unsigned char vga_io_rgfx (unsigned char reg) +{ + vga_io_w (VGA_GFX_I, reg); + return vga_io_r (VGA_GFX_D); +} + +static inline void vga_io_wgfx (unsigned char reg, unsigned char val) +{ +#ifdef VGA_OUTW_WRITE + vga_io_w_fast (VGA_GFX_I, reg, val); +#else + vga_io_w (VGA_GFX_I, reg); + vga_io_w (VGA_GFX_D, val); +#endif /* VGA_OUTW_WRITE */ +} + +static inline unsigned char vga_mm_rgfx (void __iomem *regbase, unsigned char reg) +{ + vga_mm_w (regbase, VGA_GFX_I, reg); + return vga_mm_r (regbase, VGA_GFX_D); +} + +static inline void vga_mm_wgfx (void __iomem *regbase, unsigned char reg, unsigned char val) +{ +#ifdef VGA_OUTW_WRITE + vga_mm_w_fast (regbase, VGA_GFX_I, reg, val); +#else + vga_mm_w (regbase, VGA_GFX_I, reg); + vga_mm_w (regbase, VGA_GFX_D, val); +#endif /* VGA_OUTW_WRITE */ +} + + +/* + * VGA attribute controller register read/write + */ + +static inline unsigned char vga_rattr (void __iomem *regbase, unsigned char reg) +{ + vga_w (regbase, VGA_ATT_IW, reg); + return vga_r (regbase, VGA_ATT_R); +} + +static inline void vga_wattr (void __iomem *regbase, unsigned char reg, unsigned char val) +{ + vga_w (regbase, VGA_ATT_IW, reg); + vga_w (regbase, VGA_ATT_W, val); +} + +static inline unsigned char vga_io_rattr (unsigned char reg) +{ + vga_io_w (VGA_ATT_IW, reg); + return vga_io_r (VGA_ATT_R); +} + +static inline void vga_io_wattr (unsigned char reg, unsigned char val) +{ + vga_io_w (VGA_ATT_IW, reg); + vga_io_w (VGA_ATT_W, val); +} + +static inline unsigned char vga_mm_rattr (void __iomem *regbase, unsigned char reg) +{ + vga_mm_w (regbase, VGA_ATT_IW, reg); + return vga_mm_r (regbase, VGA_ATT_R); +} + +static inline void vga_mm_wattr (void __iomem *regbase, unsigned char reg, unsigned char val) +{ + vga_mm_w (regbase, VGA_ATT_IW, reg); + vga_mm_w (regbase, VGA_ATT_W, val); +} + +#endif /* __linux_video_vga_h__ */ |